St. Clair Township Lincolnshire STP
Belleville, IL · St. Clair County · Publicly Owned Treatment Works
- Average flow
- 0.71 MGD
- Design flow
- —
- NPDES permit
- ILL048232
- Effective
- Permit expires
- December 2030
- Population served
- 12,500
- CWNS 2022
St. Clair Township Lincolnshire STP is a publicly owned wastewater treatment works in Belleville, St. Clair County, Illinois treating an average of 0.71 million gallons per day, serving about 12,500 residents. Treatment on site includes clarifiers. It discharges under NPDES permit ILL048232 (effective), which expires in December 2030, with 20 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
Unlock
Unlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 20
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at St. Clair Township Lincolnshire STP.
No verified contacts on file yet
Klarifi verifies plant and municipal decision-makers continuously. Start a free trial to browse contacts at nearby plants and flag this one for verification.
Nearby wastewater treatment plants in Illinois
Belleville · 2 mi away
3 MGD
Swansea · 2 mi away
1 MGD
O Fallon · 6 mi away
1.75 MGD
O Fallon · 6 mi away
0.38 MGD
Freeburg · 6 mi away
0.19 MGD
Belleville · 7 mi away
0.51 MGD
Mascoutah · 7 mi away
0.55 MGD
O Fallon · 7 mi away
1.98 MGD
St. Clair Township Lincolnshire STP: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 11, 2026; facility record last updated May 18, 2025.